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蓄热技术是平衡热量供应和需求的有效手段,可以提高系统的热稳定性和延长工作时间.应用于太阳能高温热发电中的单罐斜温层蓄热系统越来越受到重视.本文从热力学第二定律出发对蓄热系统的不可逆损失进行了研究,分析了蓄热过程中蓄热材料的密度、导热系数、颗粒直径和熔盐的流速等参数对蓄热系统熵产的影响.结果表明当蓄热材料密度较小,导热系数较小、蓄热球颗粒直径较小时,系统的熵产值较小;当熔盐流速较低时,系统的熵产值也较小.

参考文献

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[3] Belen Zalba;Jose M Marin;Luisa F. Cabeza;Harald Mehling .Review on thermal energy storage with phase change: materials, heat transfer analysis and applications[J].Applied thermal engineering: Design, processes, equipment, economics,2003(3):251-283.
[4] Xiaoping Yang;Xiaoxi Yang;Jing Ding;Youyuan Shao;Frank G. F. Qin;Runhua Jiang.Criteria for performance improvement of a molten salt thermocline storage system[J].Applied thermal engineering: Design, processes, equipment, economics,2012:24-31.
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